kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.14.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
task: ffff8880a9eca600 task.stack: ffff8880a9ed0000
RIP: 0010:fbcon_cursor+0x114/0x6f0 drivers/video/fbdev/core/fbcon.c:1325
RSP: 0018:ffff8880a9ed7b48 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880a5f6c040 RCX: ffff8880a15c99b4
RDX: 000000001fffffff RSI: 0000000000000001 RDI: ffff8880a15c9a20
RBP: ffff8880a9ed7b88 R08: ffff8882192bf270 R09: ffffed1014beed2c
R10: ffffed1014beed2b R11: ffff8880a5f7695f R12: ffff8880a15c9680
R13: ffff8882192bee00 R14: 0000000000000001 R15: 00000000fffffff8
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007d27c8 CR3: 000000008895a000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 set_cursor drivers/tty/vt/vt.c:602 [inline]
 set_cursor+0x1bd/0x240 drivers/tty/vt/vt.c:593
 redraw_screen+0x596/0x7c0 drivers/tty/vt/vt.c:706
 complete_change_console+0xfe/0x360 drivers/tty/vt/vt_ioctl.c:1291
 change_console+0x161/0x270 drivers/tty/vt/vt_ioctl.c:1416
 console_callback+0x337/0x390 drivers/tty/vt/vt.c:2460
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 83 05 00 00 4d 8b bc 24 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 
RIP: fbcon_cursor+0x114/0x6f0 drivers/video/fbdev/core/fbcon.c:1325 RSP: ffff8880a9ed7b48
---[ end trace adaa7eea101ae8e5 ]---